Spring-scale



(No Model.)

B. P. BERGMAN SPRING SCALE.

No. 410,952. Patented Sept. 10, 1889.

WITNESSES: 6 am N. PETERS. Phom-Lilho npmn WM EC.

UNITED STATES PATENT OFFICE.

ED\VARD F. BERGMAN, OF FRANKFORT, ASSIGNOR OF ONE-HALF TO JOHN R SLACK,OF ILION, NElV YORK.

SPRING-SCALE.

SPECIFICATION forming part of Letters Patent No. 410,952, datedSeptember 10, 1889. Original application filed October 29, 1888, SerialNo. 289,362. Divided and this application filed May 3, 1889. Serial No.

To a. whom it may concern.-

Be it known that I, EDWARD F. BERGMAN, of Frankfort, in the county ofHerkimer, in the State of New York, have invented new and usefulImprovements in Spring-Scales, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

My invention relates to spring-scales, and forms a divisional part of myapplication, Serial No. 289,362, filed October 29, 1888, and

has for its object the production of a simple and effective spring-scalewhich can be easily and cheaply manufactured by reason of the peculiarand simple construction and arrangement of its parts, and which ispleasing in appearance,compact, effective, and practicallyindestructible in use; and to this end my invention consists,essentially, in a spring of peculiar form and construction, one pointbeing rigidly retained or secured to a suitable backing for the springadapted to be attached to a suitable support or side wall of a building,the other part of the spring being extended outwardly from its supportedpoint and connected by a link to the weightengaging device.

It also consists in a novel means for operating the indicator-finger bymeans of a link pivoted thereto and to a support secured upon thespring; and it furthermore consists in the detail construction andarrangement of the parts, all as hereinafter more particularlydescribed, and pointed out in the claims.

In describing my invention, reference is had to the accompanyingdrawings, forming a part of this specification, in which like lettersindicate corresponding parts in all the views.

Figure 1 is an elevation of the preferable form of myinvention, clearlyillustrating the construction and arrangement thereof. Fig. 2 is a likeelevation illustrating a slightlymodified construction of thespring-scale and the weight-engaging device; and Fig. 3 is also anelevation of my scale, illustrating a further modified constructionthereof.

A represents the spring, which is of suitable material, having oneextremity A secured to a backing or support B and the other extremity Abent outward and downward from the point of support of the extremity A.The backing B may be of any suitable material or construction, and maybe secured to a support or the side wall of a room by any well-knownmeans.

Provided upon the backing B is the projectinglug b, pivoted to which atb is the weightengaging device 0, which preferably consists of a pivotedlever.

Hinged to the spring, and preferably to the free extremity A thereof,and hinged at a leverage at the point 0 to the weight-en gagin g device0, is the link D.

Also provided upon the backing B are the lugs 19 to which is pivoted atb the indicator finger E, which is rocked over a suitable dial or scaleF, which may be of any desirable form and construction.

Pivoted at e to the indicator-finger at aleverage with the point 5 isthe link G. The op posite extremity of said link is pivoted to a supportH, mounted upon the spring.

It will be seen that when the weight is applied to the hook O of theweight-engaging device the same will be depressed and the weight-engaging lever G will be rocked toward the backing B, thus tensioning thespring in the same direction. As the spring moves toward the backing, itwill be seen that the indicator-finger will be forced away from thebacking and will be rocked over the dial F, thus registering the weightapplied to the hook C.

By changing the relative ratio of the indicator-finger E and theweight-engaging device 0 it will be seen that the said scale may be soadjusted that although great weight may be applied to the hook C, butvery little movement of the spring is occasioned, and consequently butlittle movement of the finger. However, if desired, by changing therelative ratio of the indicator-finger E and the weight-engaging device0 the indicatorfinger may have a movement equal to that of theweight-engagin g device, or even greater or less, as desired.

This construction thus produces a scale which, by reason of the changeallowed in constructing its parts, may be used for weighing either lightor heavy objects by merely 100 extension, and consequently there is butlittle liability of its becoming permanently set. Moreover, thespring-scale is so constructed that a great proportion of the weight issustained by the weight-engaging device itself, requiring but a partthereof to be sustained by the spring, and this feature still furtherlengthens the life of the spring and adds to the desirability of thescale.

The scale illustrated in Fig. 2 is very nearly the same as thatillustrated in Fig. 1; but in this figure the weight-engaging devicedoes not support the weight to the extent of the constructionillustrated in Fig. 1.

In Fig. 3 I have illustrated the weight-engaging device and theindicator-finger as formed integral with each other in the form of abell-crank lever pivoted at the point b to a lug or lugs b projectingfrom the backing B. This device, while not as desirable as thatillustrated in Figs. 1 and 2, is very effective and is more cheaplyconstructed.

The operation of my invention will be readily perceived from theforegoing, and it will be understood that considerable change may bemade in the detail construction and arrangement of the parts withoutdeparting from the spirit of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by 40 Letters Patent, is-

1. The combination of the backing B and a spring secured to said backingand bent outwardly therefrom with an indicator-finger, a weight-engagingdevice pivoted to a support mounted on the backing B, and a connectionbetween said spring and weight-engaging device, substantially as and forthe purpose specified.

2. The combination of the backing B and the spring A secured thereto andbent outwardly therefrom, a spring-scale F, an indicator-finger E,pivoted to the backing B, and a connection Gbetween said spring andindicater-finger with a weight-engaging device pivoted to the backingand a connection between said spring and weight-engaging device,substantially as and for the purpose de' scribed.

3. The combination of the backing B, the springA secured thereto andbent outwardly therefrom, the weight-engaging device pivotally supportedupon the backing B, and a connection D between said spring andweightengaging device with an indicator-finger E, pivoted to a supportof the backing B, and a link G, pivoted to separate supports upon saidspring and backing, substantially as and for the purpose set forth.

In testimony whereof I have hereunto signed my name, in the presence oftwo attesting witnesses, at Syracuse, in the county of Onondaga, in theState of New York, this 13th day of April, 1889.

EDWARD F. BERGMAN.

W'i tn esses:

A. E. PARSONS, CLARK H. NORTON.

